-31.43% is the change from 945 to 648
Calculation steps:
[( 648 - 945 ) ÷ 945] x 100 = -31.43%
Formula
Percentage change = [(648 - 945) / 945] x 100
Subtract the new number by the original number
648 - 945 = -297
-297 ÷ 945 = -0.3142857142857143
-0.3142857142857143 x 100 = -31.43%